Improvement in lightning-rods



C. SCHNMAKER. mgwm'vement in Lightning-Rods. N91 ZLESV,"Pa'tentedluly9,1872.

UNITED STATES PATENT GEEIoE.

IMPROVEMENT IN LIGHTNING-RODS.

Specification forming part of Letters Patent No. 128,818, dated July 9,1872.

To all whom it may concern:

Be it known that I, JOHN G. SoEooNMA.- KER, of Winona, in the county ot'Winona and State of Minnesota, have invented a new and valuableImprovementin Lightning-Rods; and I do hereby declare that the followingis a full, clear, and exact description of the construction andoperation of the same, reference being had to the annexed drawing makinga part of this specification, and to the letters and figures ofreference marked thereon.

Figure l ofthe drawing is a representation of a plan view of myinvention. Fig. 2 is a cross-section of the same. Fig. 3 is a singlewire of my invention.

My invention has relation to lightning-rods, and consists in theconstruction of such rods of a series of hollow copper wires, ashereinafter specified and claimed.

A, ofthe drawing, represents a tube of copper-wire, and constitutes oneof a series which I place around a central tube, a, and twist into theform shown on Fig. 1. When thus constructed my rod presents acircular-twisted exterior7 usually of six tubular wires, and hav. ing acentral-core wire of the same material that is not twisted.

A telegraph wire constructed in the manner specified presents aconducting surface of unusual capacity, thereby insuring great certaintyin the transmission of the electric fluid.

Vhat I claim as my invention, and desire to secure by Letters Patent,is-

l. A lightning-rod, constructed of a series of twisted copper andtubular wires, substantially as specified.

2. The lightning-rod herein specilied, consisting of a series of tubularcopper-wires, A, twisted around a central supportingwire, a.,substantially as described.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

JOHN C. SCHOONMAKER.

NVtnesses:

O. B. GoULD, THoMAs WRIGHT.

